CN100507039C - Stainless steel-TiC nano composite powder and preparation method - Google Patents
Stainless steel-TiC nano composite powder and preparation method Download PDFInfo
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- CN100507039C CN100507039C CNB2007100519795A CN200710051979A CN100507039C CN 100507039 C CN100507039 C CN 100507039C CN B2007100519795 A CNB2007100519795 A CN B2007100519795A CN 200710051979 A CN200710051979 A CN 200710051979A CN 100507039 C CN100507039 C CN 100507039C
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Abstract
The invention relates to a stainless steel-ceramics nanometer composite material. The stainless steel-TiC nanometer composite powder is characterized in that it is obtained by mixing 316 stainless steel powder, Ti powder and C powder and ball milling, in which: 316 stainless steel powder of 70-90 wt%, Ti powder and C powder of 10-30 wt%, wherein, 80 wt% Ti powder and 20 wt% C powder of Ti powder and C powder, with less than 74um of average grading of Ti powder and C powder, and more than 99% of the purity. The composite material produced by the method has good corrosion resistance, good abrasion resistance, high Young's modulus, high chemical stability and long service life with simple process. Fine crystal grain powder metallurgy composite material produced by molding and sintering at high temperature the powder produced by the method has the advantages of corrosion resistance, abrasion resistance, high Young's modulus, high chemical stability and long service life.
Description
Technical field
The invention belongs to nano composite material powder technology field, particularly relate to a kind of stainless steel-ceramic nano composite material and preparation method thereof.
Background technology
Stainless steel is the special steel grade of a big class hi-tech, and its production technique can adopt rolling and powder metallurgy process is produced.Stainless material has many special performances such as corrosion-resistant, wear-resistant, high life, resistance to oxidation etc., occupies critical role in national economy.Crystal grain thinning is one of important method that improves material property
[1,2,3], simultaneously, utilize the second phase particle strengthening method also can effectively improve the physical strength of material.The TiC pottery is very stable clearance type compound, has high-melting-point, high rigidity, high Young's modulus, high chemical stability, wear-resisting and erosion resistance, has favorable conductive and heat conductivility simultaneously.Relevant TiC strengthens the existing report of stainless research document, main casting and the powder metallurgical technique of adopting, and the matrix material crystal grain of acquisition is bigger, does not also reach nano level
[4]
Yet there are no about report with the nano composite material powder of 316 stainless steels and TiC pottery premium properties.
Summary of the invention
The object of the present invention is to provide a kind of stainless steel-TiC nano composite powder and preparation method thereof, the composite powder that this method obtains has that good corrosion resistance, wearability are good, the characteristics of high Young's modulus, high chemical stability, and this method technology is simple.
To achieve these goals, technical scheme of the present invention is: stainless steel-TiC nano composite powder, it is characterized in that it is formed by 316 powder of stainless steel, Ti powder and C powder raw material mixing and ball milling, the shared mass percent of each raw material is: 316 powder of stainless steel 70-90wt%, Ti powder and C powder 10-30wt%; Wherein the mass percent of Ti powder, the shared Ti powder of C powder and C powder is: Ti powder 80wt%, C powder 20wt%, the mean particle size of Ti powder, C powder is less than 74um, purity〉99%.
The preparation method of above-mentioned stainless steel-TiC nano composite powder is characterized in that it comprises the steps:
1), be raw material with 316 powder of stainless steel, Ti powder and C powder, according to the mass percent of 316 powder of stainless steel and Ti powder and C powder be: 316 powder of stainless steel 70-90wt%, Ti powder and C powder 10-30wt% batching; Wherein the mass percent of Ti powder, the shared Ti powder of C powder and C powder is: Ti powder 80wt%, C powder 20wt%, the mean particle size of Ti powder, C powder is less than 74um, purity〉99%;
2), after the raw material after the batching mixes, adopt planetary ball mill to carry out high-energy ball milling and handle; The ball-milling processing condition is: vacuum tightness is less than or equal to 100 handkerchiefs, and the mass ratio of ball material is 20-35:1, and selecting Stainless Steel Ball for use is ball-milling medium, diameter ф 6mm, and drum's speed of rotation 250-350r/min, the ball milling time is 60-80 hour; Get stainless steel-TiC nano composite powder behind the ball milling.
(massfraction %) is: C 0.15, and Si 0.7, and Mn 0.2, and Ni 13.1, and Mo 2.3, and Cr 17.9,0 0.2, and surplus is Fe for described 316 stainless chemical ingredientss.
The invention has the beneficial effects as follows:
1, TiC is that pottery strengthens body (in mechanical milling process, Ti powder and C powder generation reaction in form TiC) in the present invention.The TiC pottery is very stable clearance type compound, have high-melting-point, high rigidity, high Young's modulus, high chemical stability, wear-resisting and erosion resistance, add to and improve the stainless steel over-all properties in the stainless steel, but too low TiC addition (less than 10wt%), DeGrain, add too many TiC (greater than 30wt%), can increase stainless fragility.Therefore, select the addition of TiC at 10-30wt%.The composite powder that this method obtains is compared with 316 powder of stainless steel, and erosion resistance, wearability, Young's modulus, chemical stability are significantly improved.
2, adopt by 316 powder of stainless steel, Ti powder and C powder raw material mixing and ball milling, in mechanical milling process, (mass percent of reaction back TiC in matrix material is: 10-30wt%) for Ti powder and C powder generation reaction in formation TiC; Utilize to have the better chemical consistency between TiC and the stainless steel, adopt high-energy ball-milling process of the present invention (being ball-milling technology condition of the present invention) to obtain nano level stainless steel-TiC composite powder (this powder size can reach the 80-120 nanometer through the x ray detection); When the stainless steel-TiC composite powder was nano level, the mechanical property and the wear resisting property of this composite powder were significantly improved.
3, the present invention adopts mixing and ball milling to form, and technology of the present invention is simple, realizes easily.
4, the stainless steel-TiC nano composite powder that utilizes the present invention to make can obtain the close grain composite powder metallurgy material behind moulding and high temperature sintering, and this material has corrosion-resistant, wear-resistant, high Young's modulus, high chemical stability, the characteristics of long service life; This material can be made various high performance auto parts etc.
Embodiment
In order to understand the present invention better, further illustrate content of the present invention below in conjunction with embodiment, but content of the present invention not only is confined to the following examples.
Embodiment 1:
With 316 Stainless Steel Powders, Ti powder and C powder is raw material, and the mean particle size of Ti powder, C powder is less than 74um, the purity of Ti powder, C powder〉mean particle size of 99%, 316 powder of stainless steel is less than 34um.Mass percent according to 316 powder of stainless steel and Ti powder and C powder is: 316 powder of stainless steel 90wt%, Ti powder and C powder 10wt% batch mixes are (in mechanical milling process, Ti powder and C powder generation reaction in form TiC, and promptly the mass percent of TiC is: 10wt%); Wherein the mass percent of Ti powder, the shared Ti powder of C powder and C powder is: Ti powder 80wt%, C powder 20wt%.After the mixing, the QM-SB planetary ball mill that adopts Nanjing University to make carries out high-energy ball milling to be handled, and selecting Stainless Steel Ball for use is ball-milling medium, diameter ф 6mm; Ratio of grinding media to material is 20:1 (mass ratio), rotating speed 250r (commentaries on classics)/min (minute), ball milling method is a dry ball milling, milling atmosphere is vacuum (vacuum tightness is not higher than 100 handkerchiefs); Behind the ball milling 60 hours, powder can obtain the stainless steel-TiC composite powder that granularity is 120 nanometers through the x ray detection.
Embodiment 2:
With 316 Stainless Steel Powders, Ti powder and C powder is raw material, and the equal granularity of Ti powder, C powder is less than 74um, purity〉the equal granularity of 99%, 316 powder of stainless steel is less than 34um.Mass percent according to 316 powder of stainless steel and Ti powder and C powder is: 316 powder of stainless steel 80wt%, Ti powder and C powder 20wt% batch mixes (in mechanical milling process, Ti powder and C powder generation reaction in form TiC); Wherein the mass percent of Ti powder, the shared Ti powder of C powder and C powder is: Ti powder 80wt%, C powder 20wt%.After the mixing, the QM-SB planetary ball mill that adopts Nanjing University to make carries out high-energy ball milling to be handled, and selecting Stainless Steel Ball for use is ball-milling medium, diameter ф 6mm; Ratio of grinding media to material is 30:1 (mass ratio), and 300 rev/mins of rotating speeds, ball milling method are dry ball milling, and milling atmosphere is vacuum (vacuum tightness is not higher than 100 handkerchiefs); Behind the ball milling 70 hours, powder can obtain the stainless steel-TiC composite powder that granularity is 100 nanometers through the x ray detection.
Embodiment 3:
With 316 Stainless Steel Powders, Ti powder and C powder is raw material, and the equal granularity of Ti powder and C powder is less than 74um, purity〉the equal granularity of 99%, 316 powder of stainless steel is less than 34um.Mass percent according to 316 powder of stainless steel and Ti powder and C powder is: 316 powder of stainless steel 70wt%, Ti powder and C powder 30wt% batch mixes (in mechanical milling process, Ti powder and C powder generation reaction in form TiC); Wherein the mass percent of Ti powder, the shared Ti powder of C powder and C powder is: Ti powder 80wt%, C powder 20wt%.After the mixing, the QM-SB planetary ball mill that adopts Nanjing University to make carries out high-energy ball milling to be handled, and selecting Stainless Steel Ball for use is ball-milling medium, diameter ф 6mm; Ratio of grinding media to material is 35:1 (mass ratio), and 350 rev/mins of rotating speeds, ball milling method are dry ball milling, and milling atmosphere is vacuum (vacuum tightness is not higher than 100 handkerchiefs); Behind the ball milling 80 hours, powder can obtain the stainless steel-TiC composite powder that granularity is 80 nanometers through the x ray detection.
Reference:
[1]Wang?Li.Tensile?and?wear?properties?of?TiC?reinforced?420?stainless?steelfabricated?by?in?situ?synthesis[J].Journal?of?Southeast?University，2004，20(4)：486-491.
[2] Yang Yuanzheng, willow is quiet. the formation of mechanical alloying non-crystaline amorphous metal and Nanoalloy [J]. and investigation of materials journal, 1995,9 (1): 33-39.
[3] Zhang Yaping, etc. the ball milling environment is to the influence [J] of mechanical alloying synthesis of nano TiC. University of Petroleum's journal, 2005,2 (29): 23-26.
[4]Zhang?H?W，Hei?Z?K，Liu?G，et?al.Formation?of?Nano-Structureed?surface?layeron?AISI?304?stainless?steel?by?means?of?surface?mechanical?attrition?treatment[J].Acta?Mater.，2003，51(7)：1871.
Claims (3)
1. stainless steel-TiC nano composite powder is characterized in that it is formed by 316 powder of stainless steel, Ti powder and C powder raw material mixing and ball milling, and the shared mass percent of each raw material is: 316 powder of stainless steel 70-90wt%, Ti powder and C powder 10-30wt%; Wherein the mass percent of Ti powder, the shared Ti powder of C powder and C powder is: Ti powder 80wt%, C powder 20wt%, the mean particle size of Ti powder, C powder is less than 74um, purity〉99%.
2. stainless steel-TiC nano composite powder according to claim 1 is characterized in that: described 316 stainless chemical ingredients mass percents are: C0.15, and Si0.7, Mn0.2, Ni13.1, Mo2.3, Cr17.9,00.2, surplus is Fe.
3. the preparation method of stainless steel-TiC nano composite powder as claimed in claim 1 is characterized in that it comprises the steps:
1), be raw material with 316 powder of stainless steel, Ti powder and C powder, according to the mass percent of 316 powder of stainless steel and Ti powder and C powder be: 316 powder of stainless steel 70-90wt%, Ti powder and C powder 10-30wt% batching; Wherein the mass percent of Ti powder, the shared Ti powder of C powder and C powder is: Ti powder 80wt%, C powder 20wt%, the mean particle size of Ti powder, C powder is less than 74um, purity〉99%;
2), after the raw material after the batching mixes, adopt planetary ball mill to carry out high-energy ball milling and handle; The ball-milling processing condition is: vacuum tightness is less than or equal to 100 handkerchiefs, and the mass ratio of ball material is 20-35: 1, and selecting Stainless Steel Ball for use is ball-milling medium, diameter ф 6mm, drum's speed of rotation 250-350r/min, the ball milling time is 60-80 hour; Get stainless steel-TiC nano composite powder behind the ball milling.
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| CN102660709A (en) * | 2012-04-24 | 2012-09-12 | 邓湘凌 | High-strength wear-resisting alloy and preparation method thereof |
| RU2543121C2 (en) * | 2013-01-10 | 2015-02-27 | Закрытое акционерное общество "Завод "Композит" (ЗАО "Завод "Композит") | Sintered composite material |
| CN103938046B (en) * | 2013-01-20 | 2016-01-20 | 江苏兆龙电气有限公司 | The corrosion of resistance to aluminium cermet material |
| CN103938050B (en) * | 2013-01-20 | 2016-02-17 | 江苏兆龙电气有限公司 | The corrosion of resistance to aluminium high desnity metal stupalith |
| CN103938051B (en) * | 2013-01-20 | 2016-05-25 | 江苏兆龙电气有限公司 | The preparation method of the corrosion of resistance to aluminium high desnity metal ceramic material |
| CN103820730B (en) * | 2013-11-11 | 2016-01-06 | 常熟市迅达粉末冶金有限公司 | A kind of high-performance powder metallurgy stainless steel and preparation method thereof |
| CN104630601A (en) * | 2015-01-27 | 2015-05-20 | 安徽同盛环件股份有限公司 | Preparation process of high temperature resistant alloy steel |
| CN104858422B (en) * | 2015-05-22 | 2017-05-31 | 东莞劲胜精密组件股份有限公司 | A kind of stainless steel composite powder for 3D printing and preparation method thereof |
| CN110153430A (en) * | 2019-06-11 | 2019-08-23 | 上海富驰高科技股份有限公司 | A kind of enhanced 316L stainless steel metal injection molding technique |
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Non-Patent Citations (4)
| Title |
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| 增强体与粉末冶金316L不锈钢的反应性. 杨霞，果世驹，孟飞.机械工程材料，第29卷第10期. 2005 |
| 增强体与粉末冶金316L不锈钢的反应性. 杨霞，果世驹，孟飞.机械工程材料，第29卷第10期. 2005 * |
| 成分参数对原位反应合成TiC/Cr18Ni8钢结硬质合金的影响. 宋桂香，刘均海，黄继华，张建纲.材料工程，第6期. 2005 |
| 成分参数对原位反应合成TiC/Cr18Ni8钢结硬质合金的影响. 宋桂香，刘均海，黄继华，张建纲.材料工程，第6期. 2005 * |
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